exif shows GPS tags, but will not remove them

[Jarno Suni]

Command
exif --remove --ifd=GPS name.jpg
tells
"IFD 'GPS' does not contain a tag '(null)'!"
but still command
exif --ifd=GPS name.jpg
shows that there are GPS tags.
I expect the first command to remove all GPS tags.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: exif 0.6.20-1
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
Uname: Linux 3.2.0-35-generic i686
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: i386
Date: Tue Dec 25 23:04:22 2012
EcryptfsInUse: Yes
InstallationMedia: Xubuntu 10.04 "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: exif
UpgradeStatus: Upgraded to precise on 2012-11-03 (51 days ago)